CVE-2025-63938 Details
Description
Tinyproxy through 1.11.2 contains an integer overflow vulnerability in the strip_return_port() function within src/reqs.c.
A remote integer overflow vulnerability has been identified in Tinyproxy versions through 1.11.2. The issue arises in the 'strip_return_port()' function within 'src/reqs.c', where the proxy improperly handles oversized numeric port values. This oversight allows attackers to bypass Tinyproxy's port restrictions, potentially accessing blocked destinations and exploiting internal services or management ports for unauthorized privilege escalation.
Users are advised to update to the patched version of Tinyproxy, which includes a fix for the integer overflow vulnerability in port number processing.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Nov 26, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/rayinaw/my-hub/blob/main/CVE-2025-63938/DISCLOSURE.md | [email protected] | Third Party Advisory |
| https://github.com/tinyproxy/tinyproxy/commit/3c0fde94981b025271ffa1788ae425257841bf5a | [email protected] | Patch |
| https://github.com/tinyproxy/tinyproxy/issues/586 | [email protected] | ExploitIssue TrackingPatch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| tinyproxy project tinyproxy | <= 1.11.2 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 2, 2026 | Initial Analysis | [email protected] |
| Nov 26, 2025 | New CVE Received | [email protected] |
| Nov 26, 2025 | CVE Modified | CISA-ADP |